For what it's worth, I don't use Safari unless forced to, just as I don't use IE unless forced to. Firefox runs on my Linux, Windows, and Mac boxes, and I like portability and commonality because it makes me have to fight with it less, my bookmarks file moves from machine to machine without hassle, etc. etc.
One of the things I really dislike about the most recent version of firefox is that they've changed the way bookmarks are managed. Used to be, you've have a 'bookmarks.html' file that was extraordinarily portable. (i.e., my bookmarks file is more than 10 years old - I've moved it from computer to computer, from one version to another. I have URLS for gopher sites, but that's another discussion). Seems that FF is now keeping bookmarks in a mysql database now. You can apparently export a bookmarks.html file from within the bookmarks manager, but it doesn't truely use the bookmarks.html file anymore.
I noticed this not all that terribly long ago because I use my bookmarks file as my homepage. It really speeds up the initial load of FF and makes it so you can quickly jump to a given page. What I noticed was that a new bookmark I'd added wasn't on the list when I restarted FF. At first I thought I'd done something weird, but a little digging showed that the 3.x versions of FF no longer use the bookmarks.html file.
ARRRRRRRRRGGGGGGGGGGGHHHHHHHHHHHHHH!!!!!!!!!!!